|Season|Tier|Division|Place|
|---|---|---|---|
|2005/06|5|1ª Aut. Pref.|—|
|2006/07|4|3ª|19th|
|2007/08|5|1ª Aut. Pref.|2nd|
|2008/09|4|3ª|18th|
|2009/10|5|1ª Aut. Pref.|3rd|
|2010/11|5|1ª Aut. Pref.|9th|
|2011/12|5|1ª Aut. Pref.|8th|
|2012/13|5|1ª Aut. Pref.|11th|
|2013/14|5|1ª Aut. Pref.|—|

Question: what is the lowest tier season to season?
Answer: 4